If you can't balance better, you probably get lower distortion with a bypass. If they are horribly unbalanced, Jorge's technique of two resistors and two bypasses may be the best of a bad deal. My impression is that this usually isn't the "best" plan, but sometimes it is.

In Class AB, music/speech distortion is lower with a bypass, and the constant current source really defeats Class AB action.

But hell. Do what works for you, your amp, and your music. It would only cost a few bucks to try all five plans. You could even rig a switch for instant comparison.

For me the best option is not in your list...for me the best option is two cathode resistors bypassed...(one for each tube)...

Only problerm with this idea is that he's using 6B4-G, which has a filament-cathode. So he would have to have separate filament windings on the power transformer or a second filament transformer to do this.

Sovtek 6B4's are current production, so getting matched pairs isn't a problem. If he just has to have NOS 6B4, then the suggestion makes more sense.

Only problerm with this idea is that he's using 6B4-G, which has a filament-cathode. So he would have to have separate filament windings on the power transformer or a second filament transformer to do this.

Yes...in this particular case ,that must need a little more complexity...

that must not be needed...(Ned)

My only preference for the double resistor...is concerning fiability...as for distortion point of vue the shared un bypassed resistor is best!